Online shopping is more popular than ever, and nearly 80 percent of Americans use the internet to make purchases, according to a December report from Pew Research. That's roughly 251 million people, a huge jump from just 16 years ago, when only 22 percent of Americans shopped on the web.

The boom in online shopping is hurting brick-and-mortar businesses. Clothing line Bebe on Friday announced it would shut down all of its retail locations by the end of May.

Macy's and Sears announced major closures this year, and RadioShack filed for Chapter 11 bankruptcy protection in early March, announcing plans to eliminate more than 500 stores across the nation. In 2015, the electronics retailer shuttered about 2,000 locations.

Last year, online retailer Amazon reported $136 billion in revenue, making it the eighth-largest US retailer based on annual sales.

The number of people who use mobile devices to shop will likely increase, especially among teens and twenty-somethings hooked to their devices.

Ninety-four percent of people ages 16 to 24 currently own smartphones, according to Global Web Index. That's a 12 percent increase from 2014, when 87 percent of people in the age group reported owning laptops or PCs, while only 82 percent owned smartphones. Today, 16 to 24-year-olds say they consider their mobile phones to be their most important devices.